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(7*x^36-(7*x^9))/(3+4) = 0
(7*x^36-7*x^9)/(3+4) = 0
(7*x^36-7*x^9)/7 = 0
7*x^36-7*x^9 = 0
7*x^9*(x^27-1) = 0
1*x^27 = 1 // : 1
x^27 = 1
x^27 = 1 // ^ 1/27
x = 1
7*x^9*(x-1) = 0
(7*x^9*(x-1))/7 = 0
( 7*x^9 )
7*x^9 = 0 // : 7
x^9 = 0
x = 0
( x-1 )
x-1 = 0 // + 1
x = 1
x in { 0, 1 }
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